mark,
it has a probe with a 6' (it was advertised with a 10' cord) cord that i put in a well that i made out of a 8" piece of copper that i capped, then i flared the other end so it wouldn't fall through, then i drilled a hole in the top of my stove and high temp siliconed it in the stove. i got the idea from a member of arborist site. it was $65 shipped which i thought was cheap enough. i don't have any pics. but can get some this week if you want. i mounted a weather proof box next to the other box on my stove and ran the cord through liquid tight conduit to the back of the stove to the well. it's very simple to adjust for colder o warmer weather.
it has four settings:
1. f/c
2. setpoint
3. differential
4. heat or cool
if i want to change a setting i open the door on the box i installed it in, push the set button 2 times adust the setpoint push the set button again adjust the differential push the set button 2 more times and i'm done. i really like the simpicity, and ease of control, but i've only had it a few days, time will tell.